Installing a 750 W Internal AC Power Supply

To install a 750 W AC power supply in a switch, follow these instructions.

All installed power supplies must have the same airflow direction (front-to-back or back-to-front) and must match the airflow direction of the installed fan modules.

Warning

Warning

To prevent an electrical hazard, make sure that the AC power cord is not connected to the power supply before you install the power supply in the power supply bay.

Warning

Warning

Make sure that the AC power supply circuit is not overloaded. Use proper over-current protection, such as a circuit-breaker, to prevent over-current conditions.

  1. If necessary, remove a blank panel from the back of the switch.
  2. Verify that the new power supply is right side up.
  3. Verify that the new power supply's airflow direction (front-to-back or back-to-front) is compatible with the other installed power supply (if any) and with the installed fan modules.
  4. Carefully slide the power supply all the way into the power supply bay (see Installing a 750 W Internal AC Power Supply).
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    Installing a 750 W AC Power Supply
    Inserting power supply into switch
  5. Push the power supply in until the latch snaps into place.

    Do not slam the power supply into the switch.

    Note

    Note

    If power supplies are not installed in both power supply bays, be sure to install a cover over the unoccupied bay. Unoccupied bays must always be covered to maintain proper system ventilation and EMI levels.

  6. Connect the AC power cord.
    1. If necessary, slide the plastic cord retainer farther away from the back of the switch.
    2. Connect the AC power cord to the input connector.
    3. Open the clip and slip it over the barrel of the connector.

      The diagram below - Power Supply with Power Cord and Retainer Attached shows the power supply with the power cord and retainer in place.

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      Power Supply with Power Cord and Retainer Attached
      Power supply with power cord and retainer attached
    4. Snap the clip firmly around the connector.
  7. Connect the other end of the power cord to an AC power outlet.
    Warning

    Warning

    Always make sure that the source outlet is properly grounded before plugging the AC power cord into the AC power supply.

To install a second power supply, repeat this procedure.

When you are finished, follow the steps in Powering up the Switch .

9036437-00 Rev AG